/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package hivemall.utils.hadoop;

import hivemall.utils.lang.Preconditions;
import hivemall.utils.lang.PrivilegedAccessor;

import java.lang.reflect.Field;

import javax.annotation.Nonnull;

import org.apache.hadoop.io.Text;

/**
 * {@link Text} that internally uses given bytes avoiding copies.
 */
public final class Text2 extends Text {

    public Text2(@Nonnull byte[] b) {
        this(b, b.length);
    }

    public Text2(@Nonnull byte[] b, int len) {
        super();
        Field bytesField = PrivilegedAccessor.getField(Text.class, "bytes");
        PrivilegedAccessor.setField(this, Preconditions.checkNotNull(bytesField), b);
        Field lengthField = PrivilegedAccessor.getField(Text.class, "length");
        PrivilegedAccessor.setField(this, Preconditions.checkNotNull(lengthField), len);
    }

}
